diff --git a/Makefile b/Makefile
index 882beb6172f8f..7cebba25dec01 100644
--- a/Makefile
+++ b/Makefile
@@ -59,6 +59,9 @@ endif
 julia-deps: | $(DIRS) $(build_datarootdir)/julia/base $(build_datarootdir)/julia/test $(build_defaultpkgdir)
 	@$(MAKE) $(QUIET_MAKE) -C $(BUILDROOT)/deps
 
+julia-stdlib:
+	@$(MAKE) $(QUIET_MAKE) -C $(BUILDROOT)/stdlib
+
 julia-base: julia-deps $(build_sysconfdir)/julia/startup.jl $(build_man1dir)/julia.1 $(build_datarootdir)/julia/julia-config.jl
 	@$(MAKE) $(QUIET_MAKE) -C $(BUILDROOT)/base
 
@@ -74,10 +77,10 @@ julia-ui-release julia-ui-debug : julia-ui-% : julia-src-%
 julia-sysimg : julia-base julia-ui-$(JULIA_BUILD_MODE)
 	@$(MAKE) $(QUIET_MAKE) -C $(BUILDROOT) $(build_private_libdir)/sys.ji JULIA_EXECUTABLE='$(JULIA_EXECUTABLE)'
 
-julia-sysimg-release : julia-sysimg julia-ui-release
+julia-sysimg-release : julia-stdlib julia-sysimg julia-ui-release
 	@$(MAKE) $(QUIET_MAKE) -C $(BUILDROOT) $(build_private_libdir)/sys.$(SHLIB_EXT)
 
-julia-sysimg-debug : julia-sysimg julia-ui-debug
+julia-sysimg-debug : julia-stdlib julia-sysimg julia-ui-debug
 	@$(MAKE) $(QUIET_MAKE) -C $(BUILDROOT) $(build_private_libdir)/sys-debug.$(SHLIB_EXT)
 
 julia-debug julia-release : julia-% : julia-ui-% julia-sysimg-% julia-symlink julia-libccalltest julia-base-cache
@@ -543,6 +546,7 @@ clean: | $(CLEAN_TARGETS)
 	@-$(MAKE) -C $(BUILDROOT)/src clean
 	@-$(MAKE) -C $(BUILDROOT)/ui clean
 	@-$(MAKE) -C $(BUILDROOT)/test clean
+	@-$(MAKE) -C $(BUILDROOT)/stdlib clean-pkg
 	-rm -f $(BUILDROOT)/julia
 	-rm -f $(BUILDROOT)/*.tar.gz
 	-rm -f $(build_depsbindir)/stringreplace \
diff --git a/deps/checksums/Pkg-ed5908796128c6227dcddefa9ec06a47066b8b01.tar.gz/md5 b/deps/checksums/Pkg-ed5908796128c6227dcddefa9ec06a47066b8b01.tar.gz/md5
new file mode 100644
index 0000000000000..c7a02baf30c7b
--- /dev/null
+++ b/deps/checksums/Pkg-ed5908796128c6227dcddefa9ec06a47066b8b01.tar.gz/md5
@@ -0,0 +1 @@
+9363513f58fc8145d2039809182f8488
diff --git a/deps/checksums/Pkg-ed5908796128c6227dcddefa9ec06a47066b8b01.tar.gz/sha512 b/deps/checksums/Pkg-ed5908796128c6227dcddefa9ec06a47066b8b01.tar.gz/sha512
new file mode 100644
index 0000000000000..146ae06d07841
--- /dev/null
+++ b/deps/checksums/Pkg-ed5908796128c6227dcddefa9ec06a47066b8b01.tar.gz/sha512
@@ -0,0 +1 @@
+aef65dc9a82665633a1d608722187d3e05193f433c8bd31599d08e13097bf52dbb56edf7b005c632df38f65e738f40ae04f304de7309762b069ffb181627f558
diff --git a/stdlib/.gitignore b/stdlib/.gitignore
new file mode 100644
index 0000000000000..d8ce799be4bb9
--- /dev/null
+++ b/stdlib/.gitignore
@@ -0,0 +1,2 @@
+/srccache
+/Pkg
diff --git a/stdlib/Makefile b/stdlib/Makefile
new file mode 100644
index 0000000000000..297a51f404629
--- /dev/null
+++ b/stdlib/Makefile
@@ -0,0 +1,24 @@
+default: Pkg
+SRCDIR := $(abspath $(dir $(lastword $(MAKEFILE_LIST))))
+JULIAHOME := $(abspath $(SRCDIR)/..)
+SRCCACHE := $(abspath $(SRCDIR)/srccache)
+BUILDDIR := $(SRCCACHE)
+
+include $(JULIAHOME)/Make.inc
+include $(JULIAHOME)/deps/tools/common.mk
+include $(JULIAHOME)/deps/tools/git-external.mk
+
+PKG := https://github.com/JuliaLang/Pkg.jl
+PKG_TAR_URL = https://api.github.com/repos/JuliaLang/Pkg.jl/tarball/$1
+$(eval $(call git-external,Pkg,PKG,,,$(BUILDDIR)))
+
+extract-pkg: $(BUILDDIR)/$(PKG_SRC_DIR)/source-extracted
+Pkg: $(BUILDDIR)/$(PKG_SRC_DIR)/source-extracted
+	rm -rf $@
+	cp -r $(BUILDDIR)/$(PKG_SRC_DIR) $@
+get-pkg: Pkg
+clean-pkg:
+	-rm -rf Pkg
+	-rm -rf $(BUILDDIR)/$(PKG_SRC_DIR)
+
+.PHONY: default extract-pkg Pkg get-pkg clean-pkg
diff --git a/stdlib/Pkg.version b/stdlib/Pkg.version
new file mode 100644
index 0000000000000..a7733e05b8262
--- /dev/null
+++ b/stdlib/Pkg.version
@@ -0,0 +1,2 @@
+PKG_BRANCH = master
+PKG_SHA1 = ed5908796128c6227dcddefa9ec06a47066b8b01
diff --git a/test/choosetests.jl b/test/choosetests.jl
index 1ce2591aff61b..57eeb67c9df72 100644
--- a/test/choosetests.jl
+++ b/test/choosetests.jl
@@ -3,7 +3,7 @@
 using Random, Sockets
 
 const STDLIB_DIR = joinpath(Sys.BINDIR, "..", "share", "julia", "stdlib", "v$(VERSION.major).$(VERSION.minor)")
-const STDLIBS = filter!(x -> isdir(joinpath(STDLIB_DIR, x)), readdir(STDLIB_DIR))
+const STDLIBS = filter!(x -> isfile(joinpath(STDLIB_DIR, x, "src", "$(x).jl")), readdir(STDLIB_DIR))
 
 """